KingDeath wrote:The Emperor doesn't ( and never did )power the Astronomican, he merely directs it's energies ( thousands of psykers power it ).
It's strange how you think that directing psychic energy throughout the length and breadth of the galaxy to allow the Imperium space travel is not up to par.
Also, the psykers feed the Emperor's psychic appetite, it is him who powers it. I don't recall him needing their power to maintain it during the Great Crusade.
"His immense psychic Powers
reach out from the Golden Throne, enveloping and protecting
Mankind across the enemy-strewn galaxy, a beacon of light in
the rnalevolent darkness."
- 6e rulebook, page 137
If the Cacodominus truly managed to control over a thousand worlds with his mind ( instead of being a powerful psyker who controled a thousand worlds ) then he displayed a kind of psychic ability far above and beyond of anything we have seen from the carriongod so far.
That display of power doesn't quite match up with "Devastates the realm of Chaos with his mind" or "Is holding Chaos back from flooding the Materium".
Or even merely directing the Astronomicon's power.
It's arguably not on par with closing up a huge Warp Rift in the Webway that was pouring Daemons of all shapes and sizes into the Materium with his presence either.
The burning Princess is able to burn holes trough warship armour, which make here the most powerful pyrokine so far described.
Tzeentchian Sorcerer Visitain, according to the art in Tome of Fate, outright blows a starship in flight up, so no.
Oh, and Magnus the Red, while fighting Leman Russ, took it upon himself to break apart the surface of Prospero, and destroyed what remained of Tizca with an Earthquake.
Plus he sort of can psychically harm Leman Russ, a Primarch, who take hits from Macro(sp?) Cannons (Starship weapon, if you recall) and endure it, as shown by Vulkan doing so.